Internal-combustion engine.



Patented Nov. 28, 1916.

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ATTORNEYS D. F. SMITH.

INTERNAL COMBUSTION ENGINE. APPLICATION FILED JAN. 24, 1916.

2 SHEETS-SHEET 2.

WITNESSES.

tion's, and Fig. 7 is Figure 1 is a central section DON FULLER SMITH, OFCOBBY, PENNSYLVANIA.

INTERNAL-COMBUSTION ENGINE.

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To all whom it may concern:

Be it known that I, DON F. SMITH, a citi- Zen of the United States, and a resident of Corry, in the ,county of Erie and State of Pennsylvania, have invented a certain new and useful Improvement in Internal-Combustion Engines, of which the'following is a specification. My invention relates to improvementsin internal combustion engines, and it consists in the combinations, constructions and arrangements herein described and claimed.

An object of myv invention .is to provide an internal combustion engin in which the admission of the explosive charge is controlled by a rotary valve, this charge being admitted alternately on opposite sides of the piston. A further object of my invention is to provide a device of the type described in which the exhaust takes place when the piston in its travel uncovers an exhaust port. f

A furtherobject of my invention is to.

provide a novel-means of supplying oil to the piston, this means being also controlled by'the .valve which controls the admission of the charge into the cylinder.

Other objects and advantages will ,appear in the following specification, and the novel features of the invention will be particularly pointed out in the appended claims.

My invention is illustrated in the accompanying drawings forming a part of this application, in which: n

through the device. Fig. 2 is a side view of the rotary valve, Fig. .3 is a side view of a portion of the engine, certain partsv being shown in section. Figs. 4, 5, and 6 are diagrammatic views showing the piston in different posia sectional view along the line 7--7 of'Fig. 1.

In carrying out my invention, 1 provide a cylinderl which is provided withthe usual water jacket 2. ,At one side of the cylinder wall there is an extension 3 having a cylindrical bore 4: which is parallel with the axis of the cylinder. Disposed within this bore is a cylindrical valve 5 which is provided with ports or passages such as those shown at 5*, 5 and 5respectively.

, As will be seen from Fig. E2, the lower part of this valve 5 is provided with a worm Specification of Letters Patent.

Application filed January 24, 1916. Seria1I-To. 73,970.

passage 16 leading into the shown in Fig. 1 with Patented Nov. as, rain.

gear 6 which meshes with a worm 7 on the crank shaft 8 of the engine. It will be underst'ood,'of course, that other means than that shown might be used for driving this rotary valve 5.

At 9 (see Fig. 1), I have shown a compression tank in which'the fuel may be compressed prior to its admission to the cylinder. The fiow of fuel is controlled by a valve 10 in a pipe 11 leading to the intake manifold 12. The intake manifold 12 communicates at one end with a passage 13 leading into one end of the cylinder 1 and at the other end with a passage 14.

An oil pipe 15 which may lead from an oil supply, not shown, communicates with a. central portion of the cylinder. The passage 5 of the valve 5 is arranged to register with the passage 13 when the valve is in a certain position, the passage 5* of the valve'is'arranged to register when the passage 16, while the passage 5 of the valve is arranged to register with the passage 14 when the valve has assumed another position, as will be hereinafter explained.

It will be observed that the' piston P which is provided with the piston rings p travels past the exhaust port 17 The piston is preferably solid and is provided with openings 18 which run through from one the piston is in the position side to the other. The spark plugs S and S i are disposed in the ends of the cylinder as shown.

From the foregoing description of the various parts ofthe device, the operation thereof may be readily understood.

Let us assume that the fuel in the tank 9 is under pressure, and that the valve 10 is open. The engine is now cranked in the usual manner. Consider Fig. 1. The intake manifold 12 is in communication with the upper portion of the cylinder, and the fuel is passing into the cylinder. The piston P is on its up stroke, and the moment that it passes its central position, the valve 5 has turned so as to shut off communication between the cylinder and the manifold. The piston continues on and compresses the charge, and this brings the piston to the firing position shown in Fig. 4:. The charge is now fired and the piston begins its down ward travel. The downward movement of the piston forces out the burnt gases through the exhaust port, but it will be observed that.

while the piston moves from the position shown in Fig. 1 to that shown in Fig. 4 on the compression stroke for the upper part of the cylinder, it is drawing in air through the exhaust port, and this air tends to scavenge the cylinder prior .to the exhaust of the cylinder when the piston makes its downward stroke.

In Fig. 5 the piston is shown as being at the middle point of its stroke in the downward direction. The charge has entered the lower part of the cylinder through the passage 14, owing to the fact that the passage 5 in the valve 5 has registered with the passage 14. Thecharge is compressed in the lower part of the cylinder precisely the same as described in connection with the upper part of the cylinder, and is fired by the spark plug S. When the piston passes the central portion of its stroke fresh air is drawn in through the exhaust port 17 and mingles with the burnt gases, thereby diluting them and tending to scavenge the cylinder.

T It will be observed from Fig. 1 that the passage 5? of the valve 5 registers with the upward stroke. The exhaust is now taking 40 place, the spark plug S having just ignited the charge which is compressed in the bottom of the cylinder. It will be observed that the piston is double acting; that is to say, while the engine is of the two-cycle type, there is an explosion for driving the piston up and down orbackward and forward at each stroke of the piston.

The device as described is simple in construction but positive in action.

I claim:

1. In an internal combustion engine, a cylinder provided with an intake port at each end thereof, and an'exhaust port disposed near the central portion'of the cylinder, an oil port disposed in the wall of the cylinder substantially midway between said intake ports, an oil pipe in communication with said oil port, and a rotary valve provided withpassages arranged to register I with said oil port and a rotary valve provided with passages arranged to register with said intake ports in different positions of the valve, and a central passage arranged to register with said oil port twice during the revolution of the valve, a piston arranged to travel past said oil port, said piston being arranged to cover said oil port when the passage in the valve is in registration with the oil port. 7

3. In an internal combustion engine, a cylinder provided with an extension, said extension being provided with a bore extending parallel with the axis of the cylinder, a rotary valve disposed within said bore, said extension being provided with diagonally extending intake ports and said valve being provided with passages arranged to register with said diagonally extending portsin different positions of the valve, one of said intake ports being in registration with the valve passage when the other is out of registration, said cylinder being also provided with an oil port and said rotary valve being provided with a passage arranged to register twice with said oil port during the revolution of said rotary valve.

DON FULLER SMITH. 

